After a traumatic Santa visit in the mall, the babies' parents rent a cabin in the mountains. Meanwhile, Chuckie is scared of Santa, and wants to stop him, while Angelica tries to right a wrong involving Phil and Lil's toys and presents.

Chuckie is afraid to go down the playground slide after accidentally using "the big kids' slide" at a pizzeria. Angelica intimidates him, and the babies consult Susie, who trains Chuckie to be "the bestest slider in the whole wide park"; The babies mistake a swimming pool for a giant "potty".